The project has three distinct aircraft variants (see
configuration table, below).
Each of these airframes carries an original factory designation which
corresponds to the basic design (A-1c or B-1c as appropriate).

NOTE: The "c" suffix
refers to the new J-85 powerplant and has been informally assigned with
the approval of the Messerschmitt Foundation in Germany. During
the war, all operational Me 262s were "a" models, which signified
installation of the Jumo 004 engine. Experimental "b"
models used the BMW 003 powerplant, leaving "c" as the next
unassigned letter.